issue_comments: 525543137

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https://github.com/pydata/xarray/pull/3220#issuecomment-525543137 https://api.github.com/repos/pydata/xarray/issues/3220 525543137 MDEyOklzc3VlQ29tbWVudDUyNTU0MzEzNw== 6063709 2019-08-28T01:15:25Z 2019-08-28T01:15:25Z CONTRIBUTOR

I can save the decoded version to a file and read it back in and it throws the error. I suppose this is traversing a different code path ```

xarray.decode_cf(xarray.Dataset.from_dict(ds.to_dict())) <xarray.Dataset> Dimensions: (time: 5) Coordinates: * time (time) object 2198-07-02 12:00:00 ... 2202-07-02 12:00:00 Data variables: average_T1 (time) datetime64[ns] ... xarray.decode_cf(xarray.Dataset.from_dict(ds.to_dict())).to_netcdf('tmp.nc') xarray.decode_cf(xarray.open_mfdataset('tmp.nc',decode_cf=False)) Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/g/data3/hh5/public/apps/miniconda3/envs/analysis3-19.07/lib/python3.6/site-packages/xarray/conventions.py", line 479, in decode_cf decode_coords, drop_variables=drop_variables, use_cftime=use_cftime) File "/g/data3/hh5/public/apps/miniconda3/envs/analysis3-19.07/lib/python3.6/site-packages/xarray/conventions.py", line 401, in decode_cf_variables stack_char_dim=stack_char_dim, use_cftime=use_cftime) File "/g/data3/hh5/public/apps/miniconda3/envs/analysis3-19.07/lib/python3.6/site-packages/xarray/conventions.py", line 306, in decode_cf_variable var = coder.decode(var, name=name) File "/g/data3/hh5/public/apps/miniconda3/envs/analysis3-19.07/lib/python3.6/site-packages/xarray/coding/times.py", line 419, in decode self.use_cftime) File "/g/data3/hh5/public/apps/miniconda3/envs/analysis3-19.07/lib/python3.6/site-packages/xarray/coding/times.py", line 90, in _decode_cf_datetime_dtype last_item(values) or [0]]) File "/g/data3/hh5/public/apps/miniconda3/envs/analysis3-19.07/lib/python3.6/site-packages/xarray/core/formatting.py", line 99, in last_item return np.ravel(array[indexer]).tolist() AttributeError: 'Array' object has no attribute 'tolist'

```

 
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